Michael Yastrzemski pulled on his Aberdeen IronBirds uniform Monday afternoon and stepped onto the freshly cut grass at LeLacheur Park in Lowell. For all intents and purposes, he was home, donning a professional jersey for the first time in front of more than 50 family members and friends, including his mother, Anne-Marie.

It was the first time that the St. John’s Prep graduate from Andover had stepped onto a field in the Bay State since he spent the summer of 2011 suiting up for the Cotuit Kettleers in the Cape League.

After a 1-for-5 performance at the plate against the host Spinners, the 23-year-old outfielder admitted that the nerves had subsided prior to Tuesday’s New York-Penn League game.